<template>
  <div id="tags-view-container" class="tags-view-container">
    <scroll-pane ref="scrollPaneRef" class="tags-view-wrapper" @scroll="handleScroll">
      <router-link
        v-for="tag in visitedViews"
        :key="tag.path"
        :data-path="tag.path"
        :class="isActive(tag) ? 'active' : ''"
        :to="{ path: tag.path ? tag.path : '', query: tag.query, fullPath: tag.fullPath ? tag.fullPath : '' }"
        class="tags-view-item"
        :style="activeStyle(tag)"
        @click.middle="!isAffix(tag) ? closeSelectedTag(tag) : ''"
        @contextmenu.prevent="openMenu(tag, $event)"
      >
        {{ tag.title }}
        <span v-if="!isAffix(tag)" @click.prevent.stop="closeSelectedTag(tag)">
          <close class="el-icon-close" style="width: 1em; height: 1em;vertical-align: middle;" />
        </span>
      </router-link>
    </scroll-pane>
    <ul v-show="visible" :style="{ left: left + 'px', top: top + 'px' }" class="contextmenu">
      <li @click="refreshSelectedTag(selectedTag)"><refresh-right style="width: 1em; height: 1em;" /> 刷新页面</li>
      <li v-if="!isAffix(selectedTag)" @click="closeSelectedTag(selectedTag)"><close style="width: 1em; height: 1em;" /> 关闭当前</li>
      <li @click="closeOthersTags"><circle-close style="width: 1em; height: 1em;" /> 关闭其他</li>
      <li v-if="!isFirstView()" @click="closeLeftTags"><back style="width: 1em; height: 1em;" /> 关闭左侧</li>
      <li v-if="!isLastView()" @click="closeRightTags"><right style="width: 1em; height: 1em;" /> 关闭右侧</li>
      <li @click="closeAllTags(selectedTag)"><circle-close style="width: 1em; height: 1em;" /> 全部关闭</li>
    </ul>
  </div>
</template>

<script lang="ts">
export default {
  name: 'TagsView',
};
</script>

<script setup lang="ts">
  import ScrollPane from './ScrollPane.vue'
  import { normalizePath } from '@/utils/path'
  import useTagsViewStore from '@/store/modules/tagsView';
  import useSettingsStore from '@/store/modules/settings'
  import usePermissionStore from '@/store/modules/permission'
  import { ComponentInternalInstance } from 'vue';
  import { RouteRecordExtra, TagView, RouteLocationRaw } from 'vue-router';
  import {RefreshRight, Close, Back, Right, CircleClose} from "@element-plus/icons-vue";

  const visible = ref(false);
  const top = ref(0);
  const left = ref(0);
  const selectedTag = ref<TagView>({});
  const affixTags = ref<TagView[]>([]);
  const scrollPaneRef = ref(ScrollPane);

  const { proxy } = getCurrentInstance() as ComponentInternalInstance;
  const route = useRoute();
  const router = useRouter();

  const visitedViews = computed(() => useTagsViewStore().visitedViews);
  const routes = computed(() => usePermissionStore().routes);
  const theme = computed(() => useSettingsStore().theme);

  watch(route, () => {
      addTags();
      moveToCurrentTag();
  })
  watch(visible, (value) => {
      if (value) {
          document.body.addEventListener('click', closeMenu);
      } else {
          document.body.removeEventListener('click', closeMenu);
      }
  })

  const isActive = (r: TagView): boolean => {
      return r.path === route.path;
  }
  const activeStyle = (tag: TagView) => {
      if (!isActive(tag)) return {};
      return {
          "background-color": theme.value,
          "border-color": theme.value
      };
  }
  const isAffix = (tag: TagView) => {
      return tag.meta && tag.meta.affix;
  }
  const isFirstView = () => {
      try {
          return selectedTag.value.fullPath === '/index' || selectedTag.value.fullPath === visitedViews.value[1].fullPath;
      } catch (err) {
          return false;
      }
  }
  const isLastView = () => {
      try {
          return selectedTag.value.fullPath === visitedViews.value[visitedViews.value.length - 1].fullPath;
      } catch (err) {
          return false;
      }
  }
  const filterAffixTags = (routes:RouteRecordExtra[], basePath = '') => {
      let tags:TagView[] = []
      routes.forEach(route => {
          if (route.meta && route.meta.affix) {
              const tagPath = normalizePath(basePath + '/' + route.path);
              tags.push({
                  fullPath: tagPath,
                  path: tagPath,
                  name: route.name,
                  meta: { ...route.meta }
              })
          }
          if (route.children) {
              const tempTags = filterAffixTags(route.children, route.path);
              if (tempTags.length >= 1) {
                  tags = [...tags, ...tempTags];
              }
          }
      })
      return tags
  }
  const initTags = () => {
      const res = filterAffixTags(routes.value);
      affixTags.value = res;
      for (const tag of res) {
          // Must have tag name
          if (tag.name) {
              useTagsViewStore().addVisitedView(tag);
          }
      }
  }
  const addTags = () => {
      const { name } = route;
      if (name) {
          useTagsViewStore().addView(route);
          if (route.meta.link) {
              useTagsViewStore().addIframeView(route);
          }
      }
      return false
  }
  const moveToCurrentTag = () => {
      nextTick(() => {
          for (const r of visitedViews.value) {
              if (r.path === route.path) {
                  scrollPaneRef.value.moveToTarget(r);
                  // when query is different then update
                  if (r.fullPath !== route.fullPath) {
                      useTagsViewStore().updateVisitedView(route);
                  }
              }
          }
      })
  }
  const refreshSelectedTag = (view: TagView) => {
      proxy?.$tab.refreshPage(view);
      if (route.meta.link) {
          useTagsViewStore().delIframeView(route);
      }
  }
  const closeSelectedTag = (view: TagView) => {
      proxy?.$tab.closePage(view).then(({ visitedViews }: any) => {
          if (isActive(view)) {
              toLastView(visitedViews, view);
          }
      })
  }
  const closeRightTags = () => {
      proxy?.$tab.closeRightPage(selectedTag.value).then(visitedViews => {
          if (!visitedViews.find(i => i.fullPath === route.fullPath)) {
              toLastView(visitedViews);
          }
      })
  }
  const closeLeftTags = () => {
      proxy?.$tab.closeLeftPage(selectedTag.value).then(visitedViews => {
          if (!visitedViews.find(i => i.fullPath === route.fullPath)) {
              toLastView(visitedViews);
          }
      })
  }
  const closeOthersTags = () => {
      router.push(selectedTag.value as RouteLocationRaw).catch(() => { });
      proxy?.$tab.closeOtherPage(selectedTag.value).then(() => {
          moveToCurrentTag();
      })
  }
  const closeAllTags = (view: TagView) => {
      proxy?.$tab.closeAllPage().then(({ visitedViews }) => {
          if (affixTags.value.some(tag => tag.path === route.path)) {
              return;
          }
          toLastView(visitedViews, view);
      })
  }
  const toLastView = (visitedViews:TagView[], view?: TagView) => {
      const latestView = visitedViews.slice(-1)[0];
      if (latestView) {
          router.push(latestView.fullPath as string);
      } else {
          // now the default is to redirect to the home page if there is no tags-view,
          // you can adjust it according to your needs.
          if (view?.name === 'Dashboard') {
              // to reload home page
              router.replace({ path: '/redirect' + view?.fullPath });
          } else {
              router.push('/');
          }
      }
  }
  const openMenu = (tag: TagView, e: MouseEvent) => {
      const menuMinWidth = 105;
      const offsetLeft = proxy?.$el.getBoundingClientRect().left; // container margin left
      const offsetWidth = proxy?.$el.offsetWidth; // container width
      const maxLeft = offsetWidth - menuMinWidth; // left boundary
      const l = e.clientX - offsetLeft + 15; // 15: margin right

      if (l > maxLeft) {
          left.value = maxLeft;
      } else {
          left.value = l;
      }

      top.value = e.clientY
      visible.value = true;
      selectedTag.value = tag;
  }
  const closeMenu = () => {
      visible.value = false;
  }
  const handleScroll = () => {
      closeMenu();
  }


  onMounted(() => {
      initTags();
      addTags();
  })
</script>

<style lang="scss" scoped>
.tags-view-container {
  height: 34px;
  width: 100%;
  background: #fff;
  border-bottom: 1px solid #d8dce5;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.12), 0 0 3px 0 rgba(0, 0, 0, 0.04);
  .tags-view-wrapper {
    .tags-view-item {
      display: inline-block;
      position: relative;
      cursor: pointer;
      height: 26px;
      line-height: 26px;
      border: 1px solid #d8dce5;
      color: #495060;
      background: #fff;
      padding: 0 8px;
      font-size: 12px;
      margin-left: 5px;
      margin-top: 4px;
      &:first-of-type {
        margin-left: 15px;
      }
      &:last-of-type {
        margin-right: 15px;
      }
      &.active {
        background-color: #42b983;
        color: #fff;
        border-color: #42b983;
        &::before {
          content: "";
          background: #fff;
          display: inline-block;
          width: 8px;
          height: 8px;
          border-radius: 50%;
          position: relative;
          margin-right: 2px;
        }
      }
    }
  }
  .contextmenu {
    margin: 0;
    background: #fff;
    z-index: 3000;
    position: absolute;
    list-style-type: none;
    padding: 5px 0;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 400;
    color: #333;
    box-shadow: 2px 2px 3px 0 rgba(0, 0, 0, 0.3);
    li {
      margin: 0;
      padding: 7px 16px;
      cursor: pointer;
      &:hover {
        background: #eee;
      }
    }
  }
}
</style>

<style lang="scss">
//reset element css of el-icon-close
.tags-view-wrapper {
  .tags-view-item {
    .el-icon-close {
      width: 16px;
      height: 16px;
      vertical-align: 2px;
      border-radius: 50%;
      text-align: center;
      transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);
      transform-origin: 100% 50%;
      &:before {
        transform: scale(0.6);
        display: inline-block;
        vertical-align: -3px;
      }
      &:hover {
        background-color: #b4bccc;
        color: #fff;
        width: 12px !important;
        height: 12px !important;
      }
    }
  }
}
</style>
